well it'll just have to come through experimentation!

but a cool device that you might want to look into is a Low Temperature Differential (LTD) stirling engine.

It's a little engine that one can build fairly easily that turns a flywheel (it has essentially no power, just enough to keep a wheel rotating) that operates off of very small heat sorces, such as your hand, or a computer, or anything like that!

Especially search youtube

hm, I totally forgot about doing that, well it's all experimental and most of it is just HV discharging through some materials to create an effect (and if it works, ball lightening?) i can actually work on instructables projects now, now that all of my schhool club projects are over, i now have "me" time. i'll see what i can do, but I can't really give any specs at this point in time

you sly devil you!